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diff --git a/README.md b/README.md new file mode 100644 index 0000000..783a224 --- /dev/null +++ b/README.md @@ -0,0 +1,41 @@ +Autocorrelation scripts +======================= + +This is a set of script to do autocorrelation measurements +of a DAB signal. The goal is to one day do a channel impulse +response measurement. + +Right now there are three scripts: + +* simulate_channel.py: Reads an I/Q file generated by ODR-DabMod and + adds some additional components, somehow equivalent to signal reflexions. + Each reflexion has a delay and an amplitude factor. + +* autocorrelate.py: Reads the I/Q file generated by the previous script + and calculate a set of autocorrelations on the whole signal. + +* autocorrelate_window.py: Same as above, but cut the file in pieces, + calculate the autocorrelation for each piece, and display as a 2D image. + +Example image:  + +The example image shows the autocorrelation (horizontal: time delay, vertical: +time offset of the different pieces) of the simulated channel. +The peaks at delay indices 0, 14 and 25 are clearly visible. + +Next steps +---------- +Read in a recording using a RTL-SDR receiver. + + +Requirements +------------ +Python with NumPy and matplotlib + +The iq files must be complex float. + + +Licence +------- +MIT. See LICENCE for details. + |